Views: 2 Author: Site Editor Publish Time: 2020-07-23 Origin: Site
In the appearance of steel pipes, the difference between seamless steel pipes and welded steel pipes is that the inner wall of the welded pipe has welding ribs, while the seamless steel pipe does not. The pressure of seamless pipes is higher. Welded pipes are generally around 10 MPa. Now welded pipes are seamlessly treated. Seamless steel tubes are formed in one step during rolling. Welded steel pipes need to be rolled and welded, usually spiral welding and direct welding. The performance of seamless tubes is better, and of course the price is higher. Seamless steel pipes are made from steel ingots or solid tube billets through perforation and then made by hot rolling, cold rolling or cold drawing. Seamless steel pipes have a hollow section and are used in large quantities as pipes for conveying fluids. Welded pipe refers to a steel pipe with seams on the surface that is welded after bending and deforming a steel strip or steel plate into a circle. The billet used for welded pipe is steel plate or strip steel. Recognition method: look inside the pipe, because the outside will be processed. The welded pipe has a gap inside and some can be seen, and some processing is not easy to see. You can touch it slowly with your hands, or look at the specifications. All of them are relatively thin. Welded pipes are made directly by machines using stainless steel strips (rolled up), and seamlessly made of round steel or pipe blanks.